Black carbon welded steel pipe means Electric Resistance Welded Pipes, mainly character is the welding beam is smooth, two end no burr, hardness is very strong, so some special material can be used for machine components.

High payload drone integrates the advantage of being effective, having good results and using low budget. Under such mode, the high payload drone can carry 10 kilogram anti worm and plant disease liquids to well protect the flora.

Drones for spraying pesticides are regarded as one of the most efficient drones in the field of agriculture drone. Drones for spraying pesticides can carry 10 kg pesticide liquids and accurately spray in the farm with moderate volume.

ASTM A53 Welded Steel Pipe made of steel plate or strip that has been crimped and welded.Products are widely used in water engineering, electric power industry, agricultural irrigation,gas transport，building structures

Construction Welded Steel Pipe because of welding into a straight line hence the name, which according to the use of different, and different back-channel production process (roughly can be divided into scaffolding pipe, fluid pipe, wire casing, bracket t